class_docstr: Patch a callback output value
  
  Act like a proxy of the output prop value on the frontend.
  
  Supported prop types: Dictionaries and lists.
docstr: Add the item to the end of a list
docstr_tok: ["Add","the","item","to","the","end","of","a","list"]
code: def append(self, item):
      """Add the item to the end of a list"""
      self._operations.append(
          _operation("Append", self._location, value=item)
      )
  
label_desc: Use image node_id 17 for calling the Patch obj's underlying member method code with example usage: obj.append(item) without return types